( w − 1 ) ( u v 2 w 2 + u v 2 w + u v + v w 3 + w 2 + w ) u v w 2 {\displaystyle {\frac {(w-1)\left(uv^{2}w^{2}+uv^{2}w+uv+vw^{3}+w^{2}+w\right)}{{\sqrt {u}}vw^{2}}}}
